A checkout staff member told Checkpoint there have been daily tears, racial abuse and - in some cases - violence.
Supermarket staff - essential workers - are being abused while struggling to keep up with the overwhelming demand of restocking shelves.
Staff are often harassed for not wearing masks or gloves, but the Ministry of Health has said supermarket staff are not required to wear such personal protective equipment.
Supermarket staff can wear masks and gloves if it makes them feel safer, but they have to supply their own.
In a statement, the company said the "level of abuse our team continues to face is incredibly concerning… taking frustrations out on supermarket staff is unacceptable".